CN112902270A - Interference-free middle-deep layer coaxial geothermal combined ground source heat pump heating system - Google Patents
Interference-free middle-deep layer coaxial geothermal combined ground source heat pump heating system Download PDFInfo
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- CN112902270A CN112902270A CN202110299958.5A CN202110299958A CN112902270A CN 112902270 A CN112902270 A CN 112902270A CN 202110299958 A CN202110299958 A CN 202110299958A CN 112902270 A CN112902270 A CN 112902270A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 89
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 191
- 239000008236 heating water Substances 0.000 claims abstract description 7
- 239000004568 cement Substances 0.000 claims description 7
- 239000004677 Nylon Substances 0.000 claims description 3
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 229910001092 metal group alloy Inorganic materials 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- -1 polypropylene Polymers 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 229920002620 polyvinyl fluoride Polymers 0.000 claims description 3
- 230000017525 heat dissipation Effects 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 description 5
- 238000004321 preservation Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/04—Hot-water central heating systems with the water under high pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/18—Hot-water central heating systems using heat pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
- F24T10/00—Geothermal collectors
- F24T10/20—Geothermal collectors using underground water as working fluid; using working fluid injected directly into the ground, e.g. using injection wells and recovery wells
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/40—Geothermal heat-pumps
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Abstract
The invention relates to an interference-free middle-deep layer coaxial geothermal combined ground source heat pump heating system, which comprises an interference-free middle-deep layer coaxial geothermal system and a circulating pump, the invention relates to an interference-free middle-deep layer coaxial geothermal system heat pump heating system, which is characterized in that an inner pipe of the interference-free middle-deep layer coaxial geothermal system adopts a novel inner pipe with an additional spiral sheet, the interference-free middle-deep layer coaxial geothermal system is connected with a first circulating pump to convey heating water to the ground source heat pump, the ground source heat pump heats the water temperature to a specified temperature according to the area of the heating area and/or the temperature required by multi-stage step heating, and low-temperature water flows through the ground source heat pump through a second circulating pump to return to the interference-free middle-deep layer coaxial geothermal system after being used in the heating area.
Description
Technical Field
The invention belongs to the technical field of interference-free medium and deep geothermal heating, and particularly relates to an interference-free medium and deep coaxial geothermal combined ground source heat pump heating system.
Background
At present, energy has become the key point of national development, and the use of fossil energy in large quantities can cause serious environmental problems. To achieve the strategic goal of 2060 year carbon neutralization, the use of clean energy instead of fossil energy is becoming a great trend. The middle-deep layer geothermal energy has the characteristics of stable heat energy, quick recovery and the like, the reservoir temperature can be recovered after the pump is stopped for several months after heating in winter, and the non-interference middle-deep layer coaxial geothermal technology can also protect underground water resources and realize 'heat taking and water non-taking'.
Because the distribution of the medium-high grade and medium-deep geothermal resources in China is different, the medium-deep geothermal resources in each area are not at higher temperature, and the regional distribution difference of the geothermal resources exists. The existing interference-free middle-deep layer coaxial geothermal engineering can not further utilize clean geothermal resources without considering other intensified heat exchange measures except working medium heat exchange. In addition, the single interference-free middle-deep layer coaxial geothermal technology has limited heating area and cannot further contribute to the improvement of economic benefits.
Disclosure of Invention
The invention aims to provide an interference-free middle and deep layer coaxial geothermal combined ground source heat pump heating system to solve the problems of increasing the heating area and improving the heat exchange capability of the interference-free middle and deep layer coaxial geothermal technology.
The purpose of the invention is realized by the following technical scheme:
an interference-free middle-deep coaxial geothermal combined ground source heat pump heating system comprises an interference-free middle-deep coaxial geothermal system 1, a first circulating pump 3, a ground source heat pump 6, a heating area 8, a second circulating pump 10 and a plurality of water pipes, wherein a plurality of valves are distributed on the water pipes;
the interference-free middle-deep layer coaxial geothermal system 1 and the ground source heat pump 6 have two modes of series connection and parallel connection, and the interference-free middle-deep layer coaxial geothermal system 1, the ground source heat pump 6 and the heating area 8 can respectively form a circulating loop by controlling the opening and closing of a valve on a water pipe;
the interference-free middle-deep layer coaxial geothermal system 1 can be connected with a first circulating pump 3 to convey heating water to a ground source heat pump 6, the ground source heat pump 6 heats the water temperature to a specified temperature according to the area of a heating area and/or the temperature required by multi-stage ladder heating, and after the heating area 8 is used, low-temperature water can flow through the ground source heat pump 6 through a second circulating pump 10 and return to the interference-free middle-deep layer coaxial geothermal system 1; the non-interference middle-deep layer coaxial geothermal system 1 can also be directly supplied to a heating area 8 through a first circulating pump 3, and low-temperature water after the heating area 8 is used returns to the non-interference middle-deep layer coaxial geothermal system 1 through a second circulating pump 10.
Furthermore, the water pipes are respectively a water pipe I2, a water pipe II 4, a water pipe III 5, a water pipe IV 7, a water pipe V9, a water pipe VI 11, a water pipe VII 12 and a water pipe VIII 13, a valve I41 and a valve II 42 are arranged on the water pipe II 4, a valve III 51 is arranged on the water pipe III 5, a valve IV 71 is arranged on the water pipe IV 7, a valve V111 is arranged on the water pipe VI 11, a valve VI 121 and a valve VII 122 are arranged on the water pipe VII 12, and a valve VIII 131 is arranged on the water pipe VIII 13.
Furthermore, the valves I41, II 42, VI 121 and VII 122 are closed, the valves III 51, IV 71, V111 and VIII 131 are opened, a loop is formed between the interference-free middle-deep layer coaxial geothermal system 1 and the ground source heat pump 6, a loop is formed between the ground source heat pump 6 and the heating area 8, the valves III 51, IV 71, V111 and VIII 131 are closed, the valves I41, II 42, VI 121 and VII 122 are opened, and the interference-free middle-deep layer coaxial geothermal system 1 and the heating area 8 directly form a loop.
Furthermore, the interference-free middle-deep layer coaxial geothermal system 1 comprises well cementation cement 102, an outer pipe 101, an inner pipe 103 and a casing head 105, the outer pipe 101 and the ground 107 are fixed 102 through the well cementation cement, the inner pipe 103 is nested in the outer pipe 101, an annular space 108 is formed between the inner pipe 103 and the outer pipe 101 and is connected with the casing head 105 for water inflow, an inner channel 109 of the inner pipe 103 is connected with the casing head 105 for water outflow, the bottommost end of the inner pipe 103 is a water inflow channel 106 between the annular space 108 and the inner channel 109 of the inner pipe 103, and the ground 107 can heat circulating water in the annular space 108 between the outer pipe 101 and the inner pipe 103.
Furthermore, a loop is formed between the interference-free middle-deep layer coaxial geothermal system 1 and the ground source heat pump 6, the water outlet of the inner pipe 103 is connected with the casing head 105, the outlet of the casing head 105 is connected with the water pipe I2, the water pipe I2 is connected with the inlet of the first circulating pump 3, the outlet of the first circulating pump 3 is connected with the water pipe III 5, the water pipe III 5 is connected with the inlet of the ground source heat pump 6, the outlet of the ground source heat pump 6 is connected with the water pipe VIII 13, the water pipe VIII 13 is connected with the casing head 105, and the water inlet of the annular space 108 between the inner pipe 103 and the outer pipe 101 is connected with.
Furthermore, the ground source heat pump 6 and the heating area 8 form a loop, the outlet of the ground source heat pump 6 is connected with a water pipe IV 7, the water pipe IV 7 is connected with the water inlet of the heating area 8, the water outlet of the heating area 8 is connected with a water pipe V9, the water pipe V9 is connected with the inlet of a second circulating pump 10, the outlet of the second circulating pump 10 is connected with a water pipe VI 11, and the water pipe VI 11 is connected with the inlet of the ground source heat pump 6 to form a circulating loop.
Furthermore, the interference-free medium-deep coaxial geothermal system 1 directly forms a loop with the heating area 8, the water outlet of the inner pipe 103 is connected with the casing head 105, the outlet of the casing head 105 is connected with the water pipe I2, the water pipe I2 is connected with the inlet of the first circulating pump 3, the outlet of the first circulating pump 3 is connected with the water pipe III 5, the heating water passes through the water pipe III 5, the water pipe II 4 and the water pipe IV 7, the water pipe IV 7 is connected with the water inlet of the heating area 8, the water outlet of the heating area 8 is connected with the water pipe V9, the water pipe V9 is connected with the inlet of the second circulating pump 10, the outlet of the second circulating pump 10 is connected with the water pipe VI 11, the backwater passes through the water pipe VI 11, the water pipe VII 12 and the water pipe VIII 13, the water pipe VIII 13 is connected with the casing head 105, and the water inlet of the annular space 108.
Further, the inner pipe 103 of the interference-free middle-deep layer coaxial geothermal system 1 is a heat preservation pipe, and the outer wall of the inner pipe 103 is attached with a spiral piece 104.
Further, the spiral piece 104 is made of nylon, polypropylene, polyvinyl fluoride or metal alloy material, and the spiral piece 104 and the inner tube 103 are welded at high temperature.
Further, there may be multiple forms of heat sinks and multi-step heating systems for the heating zone 8.
Compared with the prior art, the invention has the beneficial effects that:
according to the interference-free middle-deep layer coaxial geothermal combined ground source heat pump heating system, the ground source heat pump and the interference-free middle-deep layer coaxial geothermal system are combined to heat, so that the problem of geothermal resource distribution difference is effectively solved, and the heating area is increased; the novel inner pipe with the spiral plate is adopted, the turbulent flow enhanced heat exchange principle is utilized, the heat exchange capability of the non-interference middle-deep layer coaxial geothermal technology is improved, and the utilization of geothermal resources is further enhanced; the efficiency of renewable energy is fully exerted, the heat exchange quantity is improved, the actual heating requirement can be fully met, and the environment-friendly energy-saving and economic benefits are remarkable.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic structural diagram of the present invention.
In the figure, 1, an interference-free middle and deep layer coaxial geothermal system 101, an outer pipe 102, well cement 103, an inner pipe 104, a spiral plate 105, a casing head 106, a water inlet channel 107, a stratum 108, an annular space 109, an inner pipe channel 2, a water pipe I3, a first circulating pump 4, a water pipe II 5, a water pipe III 6, a ground source heat pump 7, a water pipe IV 8, a heating area 9, a water pipe V10, a second circulating pump 11, a water pipe VI 12, a water pipe VII 13, a water pipe VIII 41, a valve I42, a valve II 51, a valve III 71, a valve IV 111, a valve V121, a valve VI 122, a valve VII 131 and a valve VIII.
Detailed Description
The invention is further illustrated by the following examples:
the present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present invention, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
As shown in figure 1, the interference-free middle-deep coaxial geothermal combined ground source heat pump heating system is composed of an interference-free middle-deep coaxial geothermal system 1, a first circulating pump 3, a ground source heat pump 6, a heating area 8, a second circulating pump 10, a water pipe I2, a water pipe II 4, a water pipe III 5, a water pipe IV 7, a water pipe V9, a water pipe VI 11, a water pipe VII 12, a water pipe VIII 13, a valve I41, a valve II 42, a valve III 51, a valve IV 71, a valve V111, a valve VI 121, a valve VII 122 and a valve VIII 131.
The interference-free middle-deep layer coaxial geothermal system 1 and the ground source heat pump 6 have two modes of series connection and parallel connection, and the interference-free middle-deep layer coaxial geothermal system 1, the ground source heat pump 6 and the heating area 8 respectively form a circulating loop;
and a valve I41, a valve II 41, a valve III 51, a valve IV 71, a valve V111, a valve VI 121, a valve VII 122 and a valve VIII 131 are respectively distributed on the water pipe II 4, the water pipe III 5, the water pipe IV 7, the water pipe VI 11, the water pipe VII 12 and the water pipe VIII 13.
The interference-free middle-deep layer coaxial geothermal system 1 is connected with a first circulating pump 3 to convey heating water to a ground source heat pump 6, the ground source heat pump 6 can heat water to a specified temperature according to the area of a heating area and/or the temperature required by multi-stage ladder heating, and low-temperature water can flow through the ground source heat pump 6 through a second circulating pump 10 after being used in a heating area 8 and return to the interference-free middle-deep layer coaxial geothermal system 1.
According to one embodiment of the invention, the interference-free middle-deep layer coaxial geothermal combined ground source heat pump heating system is characterized in that the valve I41, the valve II 42, the valve VI 121 and the valve VII 122 are closed, the valve III 51, the valve IV 71, the valve V111 and the valve VIII 131 are opened, a loop is formed between the interference-free middle-deep layer coaxial geothermal system 1 and the ground source heat pump 6, a loop is formed between the ground source heat pump 6 and the heating area 8, the valve III 51, the valve IV 71, the valve V111 and the valve VIII 131 are closed, the valve I41, the valve II 42, the valve VI 121 and the valve VII 122 are opened, and the interference-free middle-deep layer coaxial geothermal system 1 and the heating area 8 directly form a loop.
According to one embodiment of the invention, a loop is formed between the interference-free medium-deep coaxial geothermal system 1 and the ground source heat pump 6, the water outlet of the inner pipe 103 is connected with the casing head 105, the outlet of the casing head 105 is connected with the water pipe I2, the water pipe I2 is connected with the inlet of the first circulating pump 3, the outlet of the first circulating pump 3 is connected with the water pipe III 5, the water pipe III 5 is connected with the inlet of the ground source heat pump 6, the outlet of the ground source heat pump 6 is connected with the water pipe VIII 13, the water pipe VIII 13 is connected with the casing head 105, and the water inlet of the annular space 108 between the inner pipe 103 and the outer pipe 101 is connected.
According to one embodiment of the invention, the ground source heat pump 6 and the heating area 8 form a loop, the outlet of the ground source heat pump 6 is connected with the water pipe IV 7, the water pipe IV 7 is connected with the water inlet of the heating area 8, the water outlet of the heating area 8 is connected with the water pipe V9, the water pipe V9 is connected with the inlet of the second circulating pump 10, the outlet of the second circulating pump 10 is connected with the water pipe VI 11, and the water pipe VI 11 is connected with the inlet of the ground source heat pump 6 to form a circulating loop.
According to one embodiment of the invention, the interference-free middle-deep layer coaxial geothermal system 1 directly forms a loop with a heating area 8, the water outlet of an inner pipe 103 is connected with a casing head 105, the outlet of the casing head 105 is connected with a water pipe I2, the water pipe I2 is connected with the inlet of a first circulating pump 3, the outlet of the first circulating pump 3 is connected with a water pipe III 5, heating water is connected with a water pipe III 5, a water pipe II 4 and a water pipe IV 7 through a water pipe III 5, the water pipe IV 7 is connected with the water inlet of the heating area 8, the water outlet of the heating area 8 is connected with a water pipe V9, the water pipe V9 is connected with the inlet of a second circulating pump 10, the outlet of the second circulating pump 10 is connected with a water pipe VI 11, backwater is connected with the casing head 105 through a water pipe VI 11, a water pipe VII 12 and a water pipe VIII 13, the water pipe VIII 13 is connected with.
In one embodiment of the invention, the interference-free middle and deep layer coaxial geothermal system 1 comprises well cementing cement 102, an outer pipe 101, an inner pipe 103 and a casing head 105, penetrates through a stratum 107 and exchanges heat with the stratum 107; the outer pipe 101 and the stratum 107 are fixed 102 through cementing cement; the inner pipe 103 is nested in the outer pipe 101, an annular space 108 is formed between the inner pipe 103 and the outer pipe 101 and is connected with the casing head 105 for water inlet, a channel 109 in the inner pipe 103 is connected with the casing head 105 for water outlet, and the bottommost end of the inner pipe 103 is provided with a water inlet channel 106 between the annular space 108 and the channel 109 in the inner pipe 103.
In one embodiment of the invention, the inner pipe 103 of the interference-free middle-deep layer coaxial geothermal system 1 is a heat preservation pipe, and the outer wall of the inner pipe 103 is attached with a spiral sheet 104.
In one embodiment of the present invention, the spiral sheet 104 is made of nylon, polypropylene, polyvinyl fluoride or metal alloy material.
In one embodiment of the present invention, the spiral sheet 104 is fused to the inner tube 103 at high temperature.
In one embodiment of the present invention, the heating area 8 may have various types of heat dissipation sources (domestic water, central air conditioner, floor heating, radiator fins, etc.) and a multi-step heating system.
The invention adopts the mode of combining the ground source heat pump with the non-interference middle-deep layer coaxial geothermal system to heat, effectively solves the problem of geothermal resource distribution difference, improves the heating area and improves the economic benefit; the novel inner pipe with the spiral plate is adopted, the turbulence intensified heat exchange principle is utilized, the heat exchange capability of the non-interference middle-deep layer coaxial geothermal technology is improved, and the utilization of geothermal resources is further intensified.
Example 1
The non-interference middle-deep coaxial geothermal system 1 is directly used as a heat supply source, the working condition is suitable for the high temperature of the geothermal layer in the area, the valves III 51, IV 71, V111 and VIII 131 are in a closed state under the working condition, the valves I41, II 42, VI 121 and VII 122 are opened, the circulating water in the annular space 108 between the outer pipe 101 and the inner pipe 103 is heated by the stratum 107 in the non-interference middle-deep coaxial geothermal system 1, the heated circulating water is pumped out from the inner pipe channel 109 by the first circulating pump 3 and is directly supplied to the heating area 8, after the heating area 8 is utilized by a multistage step heating system or other devices, the return water is conveyed back to the annular space 108 by the second circulating pump 10 and is heated by the stratum 107 again, and a heat supply cycle is completed.
Example 2
The interference-free middle-deep layer coaxial geothermal system 1 and the ground source heat pump 6 supply heat jointly, the working condition is suitable for the condition that the temperature of the stratum in the area is not high or the heating area needs to be increased, under the working condition, the valve I41, the valve II 42, the valve VI 121 and the valve VII 122 are in a closed state, the valve III 51, the valve IV 71, the valve V111 and the valve VIII 131 are opened, the stratum 107 in the interference-free middle-deep layer coaxial geothermal system 1 heats circulating water in an annular space 108 between an outer pipe 101 and an inner pipe 103, the heated circulating water is pumped out from an inner pipe channel 109 by a first circulating pump 3, is heated to a specified temperature by a ground source heat pump 6 and then is conveyed to a heating area 8, and after the heating area 8 is utilized by a multistage step heating system or other devices, the return water is conveyed by the second circulating pump 10, returns to the annular space 108 through the ground source heat pump 6, and is heated by the stratum 107 again, so that a heating cycle is completed.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. An interference-free middle-deep layer coaxial geothermal combined ground source heat pump heating system is characterized in that: the system comprises an interference-free middle-deep layer coaxial geothermal system (1), a first circulating pump (3), a ground source heat pump (6), a heating area (8), a second circulating pump (10) and a plurality of water pipes, wherein a plurality of valves are distributed on the water pipes;
the interference-free middle-deep coaxial geothermal system (1) and the ground source heat pump (6) have two modes of series connection and parallel connection, and the interference-free middle-deep coaxial geothermal system (1), the ground source heat pump (6) and the heating area (8) can respectively form a circulating loop by controlling the opening and closing of a valve on a water pipe;
the interference-free middle-deep layer coaxial geothermal system (1) can be connected with a first circulating pump (3) to convey heating water to a ground source heat pump (6), the ground source heat pump (6) heats water to a specified temperature according to the area of a heating area and/or the temperature required by multi-stage step heating, low-temperature water in the heating area (8) can flow through the ground source heat pump (6) through a second circulating pump (10) and return to the interference-free middle-deep layer coaxial geothermal system (1), the interference-free middle-deep layer coaxial geothermal system (1) can also be directly supplied to the heating area (8) through the first circulating pump (3), and the low-temperature water in the heating area (8) returns to the interference-free middle-deep layer coaxial geothermal system (1) through the second circulating pump (10).
2. The interference-free middle-deep coaxial geothermal combined ground source heat pump heating system according to claim 1, characterized in that: the water pipes are respectively a water pipe I (2), a water pipe II (4), a water pipe III (5), a water pipe IV (7), a water pipe V (9), a water pipe VI (11), a water pipe VII (12) and a water pipe VIII (13), a valve I (41) and a valve II (42) are arranged on the water pipe II (4), a valve III (51) is arranged on the water pipe III (5), a valve IV (71) is arranged on the water pipe IV (7), a valve V (111) is arranged on the water pipe VI (11), a valve VI (121) is arranged on the water pipe VII (12), and a valve VII (122) and a valve VIII (131) are arranged on the water pipe VIII (13).
3. The interference-free middle-deep coaxial geothermal combined ground source heat pump heating system according to claim 2, characterized in that: the valves I (41), II (42), VI (121) and VII (122) are closed, the valves III (51), IV (71), V (111) and VIII (131) are opened, a loop is formed between the interference-free middle-deep layer coaxial geothermal system (1) and the ground source heat pump (6), a loop is formed between the ground source heat pump (6) and the heating area (8), the valves III (51), IV (71), V (111) and VIII (131) are closed, the valves I (41), II (42), VI (121) and VII (122) are opened, and the interference-free middle-deep layer coaxial geothermal system (1) directly forms a loop with the heating area (8).
4. The interference-free middle-deep coaxial geothermal combined ground source heat pump heating system according to claim 3, characterized in that: the interference-free middle-deep layer coaxial geothermal system (1) comprises well cementation cement (102), an outer pipe (101), an inner pipe (103) and a casing head (105), the inner pipe (103) penetrates through a stratum (107) and exchanges heat with the stratum (107), the outer pipe (101) and the stratum (107) are fixed (102) through the well cementation cement, the inner pipe (103) is nested in the outer pipe (101), an annular space (108) is formed between the inner pipe (103) and the outer pipe (101) and connected with the casing head (105) for water inflow, an inner channel (109) of the inner pipe (103) is connected with the casing head (105) for water outflow, the bottommost end of the inner pipe (103) is a water inflow channel (106) between the annular space (108) and the inner channel (109) of the inner pipe (103), and the stratum (107) can heat circulating water in the annular space (108) between the outer pipe (101) and.
5. The interference-free middle-deep coaxial geothermal combined ground source heat pump heating system according to claim 4, characterized in that: an interference-free middle-deep layer coaxial geothermal system (1) and a ground source heat pump (6) form a loop, a water outlet of an inner pipe (103) is connected with a casing head (105), an outlet of the casing head (105) is connected with a water pipe I (2), the water pipe I (2) is connected with an inlet of a first circulating pump (3), an outlet of the first circulating pump (3) is connected with a water pipe III (5), the water pipe III (5) is connected with an inlet of the ground source heat pump (6), an outlet of the ground source heat pump (6) is connected with a water pipe VIII (13), the water pipe VIII (13) is connected with the casing head (105), a water inlet of an annular space (108) between the inner pipe (103) and an outer pipe (101) is connected with the casing head (105), and a circulation loop is.
6. The interference-free middle-deep coaxial geothermal combined ground source heat pump heating system according to claim 4, characterized in that: the ground source heat pump (6) and the heating area (8) form a loop, an outlet of the ground source heat pump (6) is connected with a water pipe IV (7), the water pipe IV (7) is connected with a water inlet of the heating area (8), a water outlet of the heating area (8) is connected with a water pipe V (9), the water pipe V (9) is connected with an inlet of a second circulating pump (10), an outlet of the second circulating pump (10) is connected with a water pipe VI (11), and the water pipe VI (11) is connected with an inlet of the ground source heat pump (6) to form a circulating loop.
7. The interference-free middle-deep coaxial geothermal combined ground source heat pump heating system according to claim 4, characterized in that: the non-interference medium-deep coaxial geothermal system (1) and the heating area (8) form a loop, the water outlet of an inner pipe (103) is connected with a casing head (105), the outlet of the casing head (105) is connected with a water pipe I (2), the water pipe I (2) is connected with the inlet of a first circulating pump (3), the outlet of the first circulating pump (3) is connected with a water pipe III (5), heating water is connected with the inlet of a second circulating pump (10) through a water pipe III (5), a water pipe II (4) and a water pipe IV (7), the water pipe IV (7) is connected with the water inlet of the heating area (8), the water outlet of the heating area (8) is connected with a water pipe V (9), the water pipe V (9) is connected with the inlet of the second circulating pump (10), the outlet of the second circulating pump (10) is connected with a water pipe VI (11), backwater is connected with a water pipe VI (11), a water pipe VII (12) and a water pipe VIII (13), the water pipe VIII (13) is connected with the casing head (105), the water inlet, forming a circulation loop.
8. The interference-free middle-deep coaxial geothermal combined ground source heat pump heating system according to claim 4, characterized in that: an inner pipe (103) of the interference-free middle-deep layer coaxial geothermal system (1) is a heat-insulating pipe, and a spiral sheet (104) is attached to the outer wall of the inner pipe (103).
9. The interference-free middle-deep coaxial geothermal combined ground source heat pump heating system according to claim 8, characterized in that: the spiral sheet (104) is made of nylon, polypropylene, polyvinyl fluoride or metal alloy materials, and the spiral sheet (104) and the inner pipe (103) are welded at high temperature.
10. The interference-free middle-deep coaxial geothermal combined ground source heat pump heating system according to claim 1, characterized in that: the heating area (8) can have various forms of heat dissipation sources and a multi-step heating system.
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